flattening a list with some elements being lists

[buran]

def flatten(lst):
    result = []
    for item in lst:
        if isinstance(item, (list, tuple)): # You may add more container types if needed
            result.extend(flatten(item))
        else:
            result.append(item)
    return result
    
n = [[1, 2, 3], [[4]], [5], [['spam','ham','bacon'] , [['foo','bar','baz']], ('x','y','z')], 6]
print flatten(n)

Output:
[1, 2, 3, 4, 5, 'spam', 'ham', 'bacon', 'foo', 'bar', 'baz', 'x', 'y', 'z', 6]